Andrew Willatsen worked as a draftsman at Frank Lloyd Wright's Studio in Illinois from about 1902 to 1907. In 1909 he formed the partnership of Willatsen & Byrne which lasted until 1913. Together with Byrne and as an independent architect, Willatsen designed many residential projects in the Prairie and Craftsman Style. The Clarke residence, built in 1909 and revised in 1911 and 1929, shows the influence of the style of Frank Lloyd Wright.

Scanned from original drawing in RGB at 200-400 dpi, saved in TIFF format, changed to indexed color, enhanced and resized using Adobe Photoshop, and imported as JPEG2000 using Contentdm software's JPEG2000 Extension. 2006.